potassium permanganate + hydrogen peroxide

Question

請問potassium permanganate + hydrogen peroxide條式係點?

如果可以,請分開兩條half equation + 一條full equation列出來..thx!!...

Answer 1

When the potassium permanganate solution is acidified, the two half equations would be
H2O2(aq) → 2H+(aq) + O2(g) + 2e-
MnO4-(aq) + 8H+(aq) + 5e- → Mn2+(aq) + 4H2O(l)

The overall equation is
2MnO4-(aq) + 6H+(aq) + 5H2O2(aq) → 2Mn2+(aq) + 8H2O(l) + 5O2(g)

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When the potassium permanganate solution is neutral or alkaline, the two half equations would be
H2O2(aq) + 2OH-(aq) → 2H2O(l) + O2(g) + 2e-
MnO4-(aq) + 2H2O(l) + 3e- → MnO2(s) + 4OH-(aq)

The overall equation is
2MnO4-(aq) + 3H2O2(aq) → 2MnO2(s) + 2OH-(aq) + 2H2O(l) + 3O2(g)